Surly Krampus 29er Steel Mountain Bike with First Loser Fork – XL Frame, Grade B

Pioneering the plus-size revolution since its inception, the Surly Krampus is engineered for riders seeking unstoppable capability on any terrain. Designed to conquer rugged trails and technical obstacles alike, this mountain bike combines robust construction with versatile adaptability. Its 29 x 3” tires deliver unmatched traction and stability, whether navigating rocky singletracks or conquering loose gravel paths—all while maintaining smooth handling for all-day adventures.

Crafted from Surly’s renowned 100% chromoly steel frame and fork, the Krampus balances strength and agility through precision engineering. The double-butted main triangle and trumpet-flared tubes create a responsive yet durable platform that absorbs shock without sacrificing stiffness. Adjustable rear dropouts with Gnot-Boost 145mm spacing offer unmatched flexibility: seamlessly compatible with Boost 148 x 12mm and standard 142 x 12mm thru-axles, plus 135mm quick-release hubs using included washers. Internal dropper seatpost routing ensures clean lines while prioritizing rider comfort during steep descents or technical climbs.

Equipped with reliable components like Shimano Deore’s smooth-shifting drivetrain (MT510 crankset paired with M6100 groupset) and Avid BB5 mechanical disc brakes (with 180/160mm rotors), this bike delivers precision control even in demanding conditions. WTB ST i40 TCS wheels paired with Surly’s tubeless-ready Dirt Wizard tires provide superior grip on loose surfaces, while Kalloy’s lightweight stem and Salsa Rustler handlebar enhance maneuverability. A Selle Italia saddle ensures comfort over long rides, making the Krampus ideal for both trail exploration and endurance riding.

Sizing Chart
| Size | Rider Height | Frame Geometry | Tire Clearance |
|——|————–|—————-|—————-|
| SM | 5’4″ – 5’8″ | Compact | 29 x 3″ max |
| MD | 5’7″ – 6’0″ | Balanced | 29 x 3″ max |
| LG | 5’11” – 6’3″ | Aggressive | 29 x 3″ max |
| XL | 6’2″ – 6’6″ | Extra-long | 29 x 3″ max |

This Grade B demo bike comes ready for action but may show minor cosmetic wear from testing—scratches on the frame or slight component aging—while retaining full functional integrity. Some parts may differ slightly from stock specifications due to prior use or upgrades.

For plus-sized riders or anyone craving confidence on gnarly trails, the Krampus combines rugged durability with smart design innovations that set it apart from conventional mountain bikes. Its corrosion-resistant E.D.-coated finish and thoughtful geometry adjustments ensure this trailblazer remains a top choice for conquering demanding off-road environments.